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Tech Question
Gary torbey , massena, NY, 1969 plymouth road runner 440
Are siamese engine blocks ok for street use? I understand that there is no water jacket between the cylinders and they run hotter. Are these blocks reliable for street use? If they are ok for street use, is there anything that you recommend to keep them running cooler? What's the bottom line?
Gary-
Very good question. Mopar guys have always ridiculed Chevys for their simaesed 400 smallblock. Then MP came out with the siamesed Megablock, and what could we say?
I have heard stories of guys who have drilled a seried of small holes between the bores on those blocks. I can't see them being large enough to have any significant effect. The bottom line is that it doesn't seem to be a problem. Thousands have been sold, I am aware of no specific flaws or hassles, I personally know of several that have been street-driven for quite a while. When you think about it, the vast majority of heat rejection occurs through the heads anyway.
Rick
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